Handsfree Apparatus Including Volume Control

1. A handsfree apparatus for a vehicle to communicate with a cellular phone, the apparatus comprising: a sound output unit for outputting a sound; means for receiving, from the cellular phone, phoning state information indicating a plurality of phoning states of the cellular phone; means for storing a separate sound volume corresponding to each of the plurality of phoning states; means for identifying the phoning state of the cellular phone from the phoning state information received by the receiving means, and means for causing the sound output unit to output a sound corresponding to the identified phoning state in a sound volume, which is stored in the storing means and corresponds to the identified phoning state, wherein the storing means further stores a sound volume corresponding to each of the plurality of phoning states with respect to each of a plurality of phone communications kinds, the plurality of communications kinds including a usual phone communications kind and an emergency phone communications kind; the identifying means further identifies a phone communications kind of the cellular phone from the plurality of phone communications kinds, and the causing means causes the sound output unit to output a sound corresponding to the identified phoning state with respect to the identified phone communications kind in a sound volume, which is stored in the storing means and corresponds to the identified phoning state with respect to the identified phone communications kind, and when the identifying means identifies a communicating state as one of the plurality of phoning states with respect to the emergency phone communications kind, the causing means causes the sound output unit to switch a sound to a sound volume, which is stored in the storing means and corresponds to the communicating state with respect to the emergency communications kind.

2. The handsfree apparatus of claim 1 , further comprising means for setting a phone communications kind by a user, wherein the identifying means identifies the phone communications kind set by the user via the setting means.

3. The handsfree apparatus of claim 1 , further comprising: a display unit for having a display window, the control means further causing the display unit to visually notify a user of a phoning state change by switching a display in the display window based on the identified phoning state.

4. The handsfree apparatus of claim 1 , wherein: the receiving means receives as the phoning state information AT command +CIEV from the cellular phone, and the control unit determines the phoning state by determining +CIEV received by the receiving means.

5. The handsfree apparatus of claim 1 , wherein the control means executes an error handling when the storing means does not store a sound volume corresponding to the identified phoning state.

6. The handsfree apparatus of claim 1 , wherein: the plurality of phoning state includes an incoming state, a dialing state, and a calling state in addition to the communicating state.

7. The handsfree apparatus of claim 1 , further comprising: means for answering a call being sent to the cellular phone, the answering means being separate from the cellular phone.

8. A method for setting a sound volume in a handsfree apparatus for a vehicle to communicate with a cellular phone, the method comprising: storing a sound volume corresponding to each of a plurality of phoning states of the cellular phone with respect to each of a plurality of phone communications kinds, the plurality of communications kinds including a usual phone communications kind and an emergency phone communications kind; receiving and identifying a phoning state of the cellular phone and a phone communications kind; and outputting via a sound output unit a sound corresponding to the identified phoning state with respect to the identified communications kind in a sound volume, which is stored and corresponds to the identified phoning state with respect to the identified phone communications kind, when a communicating state with respect to the emergency communications kind is identified as one of the plurality of phoning state, a sound outputted via the sound output unit is switched to a sound volume corresponding to the communicating state with respect to the emergency communications kind.

9. The method for setting a sound volume according to claim 8 , further comprising: providing means for answering a call being sent to the cellular phone in the handsfree apparatus; and providing means for initiating a call using the cellular phone in the handsfree apparatus.

10. A handsfree apparatus for a vehicle which communicates with a cellular phone, the apparatus comprising: means for answering a call being sent to the cellular phone, the answering means being separate from the cellular phone; means for initiating a call using the cellular phone, the initiating means being separate from the cellular phone; a sound output unit for outputting a sound; means for receiving phoning state information indicating a plurality of phoning states from the cellular phone; and means for storing a separate sound volume for each of the plurality of phoning states with respect to each of a plurality of phone communications kinds; means for identifying the phoning state of the cellular phone from the phoning state information received from the receiving means; and means for causing the sound output unit to output a sound corresponding to the identified phoning state in a sound volume stored in the storing means and corresponding to the identified phoning state; wherein the identifying means further identifies a phone communications kind of the cellular phone from the plurality of phone communications kinds, and the causing means causes the sound output unit to output a sound corresponding to the identified phoning state with respect to the identified phone communications kind in a sound volume, which is stored in the storing means and corresponds to the identified phoning state with respect to the identified phone communications kind.